The multi-PC setup comes of age?

We have a couple of pretty impressive entries on page two of our "post a picture of your setup" thread in the forums. Check out those pictures from mhorwich and SuperSecret_Squirrel (who is presumably the brother of TR's omnipresent Anonymous Gerbil). I didn't realize multi-computer setups were so common out there. How many PCs does a person need?

Apparently, about four.

Speaking of which, pictures of Damage Labs are coming. Soon as I get time.